git.sesse.net Git - vlc/blob - plugins/mp4/mp4.c

   1 /*****************************************************************************
   2  * mp4.c : MP4 file input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001 VideoLAN
   5  * $Id: mp4.c,v 1.1 2002/07/17 21:37:27 fenrir Exp $
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #include <stdlib.h>                                      /* malloc(), free() */
  27 #include <string.h>                                              /* strdup() */
  28 #include <errno.h>
  29 #include <sys/types.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/input.h>
  33
  34 #include "libmp4.h"
  35 #include "mp4.h"
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static void input_getfunctions( function_list_t * );
  41 static int  MP4Demux         ( input_thread_t * );
  42 static int  MP4Init          ( input_thread_t * );
  43 static void MP4End           ( input_thread_t * );
  44
  45 /*****************************************************************************
  46  * Build configuration tree.
  47  *****************************************************************************/
  48 MODULE_CONFIG_START
  49 MODULE_CONFIG_STOP
  50
  51 MODULE_INIT_START
  52     SET_DESCRIPTION( "MP4 file input" )
  53     ADD_CAPABILITY( DEMUX, 242 )
  54 MODULE_INIT_STOP
  55
  56 MODULE_ACTIVATE_START
  57     input_getfunctions( &p_module->p_functions->demux );
  58 MODULE_ACTIVATE_STOP
  59
  60 MODULE_DEACTIVATE_START
  61 MODULE_DEACTIVATE_STOP
  62
  63 /*****************************************************************************
  64  * Functions exported as capabilities. They are declared as static so that
  65  * we don't pollute the namespace too much.
  66  *****************************************************************************/
  67 static void input_getfunctions( function_list_t * p_function_list )
  68 {
  69 #define input p_function_list->functions.demux
  70     input.pf_init             = MP4Init;
  71     input.pf_end              = MP4End;
  72     input.pf_demux            = MP4Demux;
  73     input.pf_rewind           = NULL;
  74 #undef input
  75 }
  76
  77 /*****************************************************************************
  78  * Declaration of local function
  79  *****************************************************************************/
  80 static void MP4_ParseTrack();
  81
  82 static int MP4_CreateChunksIndex();
  83 static int MP4_CreateSamplesIndex();
  84
  85 static void MP4_StartDecoder();
  86 static void MP4_StopDecoder();
  87
  88 static int  MP4_ReadSample();
  89 static int  MP4_DecodeSample();
  90
  91 #define MP4_Set4BytesLE( p, dw ) \
  92     *((u8*)p) = ( dw&0xff ); \
  93     *((u8*)p+1) = ( ((dw)>> 8)&0xff ); \
  94     *((u8*)p+2) = ( ((dw)>>16)&0xff ); \
  95     *((u8*)p+3) = ( ((dw)>>24)&0xff )
  96
  97 #define MP4_Set2BytesLE( p, dw ) \
  98     *((u8*)p) = ( (dw)&0xff ); \
  99     *((u8*)p+1) = ( ((dw)>> 8)&0xff )
 100
 101
 102 /*****************************************************************************
 103  * MP4Init: check file and initializes MP4 structures
 104  *****************************************************************************/
 105 static int MP4Init( input_thread_t *p_input )
 106 {
 107     u8  *p_peek;
 108     u32 i_type;
 109
 110     demux_data_mp4_t *p_demux;
 111
 112     MP4_Box_t *p_moov;
 113     MP4_Box_t *p_ftyp;
 114
 115
 116     MP4_Box_t *p_mvhd;
 117     MP4_Box_t *p_trak;
 118
 119     int i;
 120     /* I need to seek */
 121     if( !p_input->stream.b_seekable )
 122     {
 123         msg_Warn( p_input, "MP4 plugin discarded (unseekable)" );
 124         return( -1 );
 125
 126     }
 127     /* Initialize access plug-in structures. */
 128     if( p_input->i_mtu == 0 )
 129     {
 130         /* Improve speed. */
 131         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE ;
 132     }
 133
 134     /* a little test to see if it could be a mp4 */
 135     if( input_Peek( p_input, &p_peek, 8 ) < 8 )
 136     {
 137         msg_Warn( p_input, "MP4 plugin discarded (cannot peek)" );
 138         return( -1 );
 139     }
 140     i_type = ( p_peek[4] << 24 ) + ( p_peek[5] << 16 ) +
 141                 ( p_peek[6] << 8 ) + ( p_peek[7] );
 142     switch( i_type )
 143     {
 144         case( FOURCC_ftyp ):
 145         case( FOURCC_moov ):
 146         case( FOURCC_moof ):
 147         case( FOURCC_mdat ):
 148         case( FOURCC_udta ): /* should never match but ... */
 149         case( FOURCC_free ):
 150         case( FOURCC_skip ):
 151         case( FOURCC_wide ): /* not mp4 compliant but ... */
 152             break;
 153          default:
 154             msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" );
 155             return( -1 );
 156     }
 157
 158     /* create our structure that will contains all data */
 159     if( !( p_input->p_demux_data =
 160                 p_demux = malloc( sizeof( demux_data_mp4_t ) ) ) )
 161     {
 162         msg_Err( p_input, "out of memory" );
 163         return( -1 );
 164     }
 165     memset( p_demux, 0, sizeof( demux_data_mp4_t ) );
 166     p_input->p_demux_data = p_demux;
 167
 168
 169     /* Now load all boxes ( except raw data ) */
 170     if( !MP4_ReadBoxRoot( p_input, &p_demux->box_root ) )
 171     {
 172         msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" );
 173         return( -1 );
 174     }
 175
 176     MP4_DumpBoxStructure( p_input, &p_demux->box_root );
 177
 178     if( ( p_ftyp = MP4_FindBox( &p_demux->box_root, FOURCC_ftyp ) ) )
 179     {
 180         switch( p_ftyp->data.p_ftyp->i_major_brand )
 181         {
 182             case( FOURCC_isom ):
 183                 msg_Info( p_input,
 184                           "ISO Media file (isom) version %d.",
 185                           p_ftyp->data.p_ftyp->i_minor_version );
 186                 break;
 187             default:
 188                 msg_Info( p_input,
 189                           "Unrecognize major file specification." );
 190                 break;
 191         }
 192     }
 193     else
 194     {
 195         msg_Info( p_input, "File Type box missing(assume ISO Media file)" );
 196     }
 197
 198     /* the file need to have one moov box */
 199     if( !( p_moov = MP4_FindBox( &p_demux->box_root, FOURCC_moov ) ) )
 200     {
 201         msg_Warn( p_input, "MP4 plugin discarded (missing moov box)" );
 202         MP4End( p_input );
 203         return( -1 );
 204     }
 205
 206     if( MP4_CountBox( &p_demux->box_root, FOURCC_moov ) != 1 )
 207     {
 208         msg_Warn( p_input, "more than one \"moov\" box (continuying anyway)" );
 209     }
 210
 211     if( !(p_mvhd = MP4_FindBox( p_moov, FOURCC_mvhd ) ) )
 212     {
 213         msg_Err( p_input, "cannot find \"mvhd\" box" );
 214         MP4End( p_input );
 215         return( -1 );
 216     }
 217     else
 218     {
 219         p_demux->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
 220     }
 221
 222     p_demux->i_tracks = MP4_CountBox( p_moov, FOURCC_trak );
 223     msg_Dbg( p_input, "find %d track%c",
 224                         p_demux->i_tracks,
 225                         p_demux->i_tracks ? 's':' ' );
 226
 227     if( !( p_trak = MP4_FindBox( p_moov, FOURCC_trak ) ) )
 228     {
 229         msg_Err( p_input, "cannot find /moov/trak !" );
 230         MP4End( p_input );
 231         return( -1 );
 232     }
 233
 234     /* allocate memory */
 235     p_demux->track = calloc( p_demux->i_tracks, sizeof( track_data_mp4_t ) );
 236
 237     /* now process each track and extract all usefull informations */
 238     for( i = 0; i < p_demux->i_tracks; i++ )
 239     {
 240         MP4_ParseTrack( p_input, &p_demux->track[i], p_trak );
 241
 242         if( p_demux->track[i].b_ok )
 243         {
 244             char *psz_cat;
 245             switch( p_demux->track[i].i_cat )
 246             {
 247                 case( VIDEO_ES ):
 248                     psz_cat = "video";
 249                     break;
 250                 case( AUDIO_ES ):
 251                     psz_cat = "audio";
 252                     break;
 253                 default:
 254                     psz_cat = "";
 255                     break;
 256             }
 257
 258             msg_Dbg( p_input, "adding track(%d) %s (%s) language %c%c%c",
 259                             i,
 260                             psz_cat,
 261                             p_demux->track[i].b_enable ? "enable":"disable",
 262                             p_demux->track[i].i_language[0],
 263                             p_demux->track[i].i_language[1],
 264                             p_demux->track[i].i_language[2] );
 265         }
 266         else
 267         {
 268             msg_Dbg( p_input, "ignoring track(%d)", i );
 269         }
 270
 271         p_trak = MP4_FindNextBox( p_trak );
 272     }
 273
 274     /*  create one program */
 275     vlc_mutex_lock( &p_input->stream.stream_lock );
 276     if( input_InitStream( p_input, 0 ) == -1)
 277     {
 278         vlc_mutex_unlock( &p_input->stream.stream_lock );
 279         msg_Err( p_input, "cannot init stream" );
 280         MP4End( p_input );
 281         return( -1 );
 282     }
 283     if( input_AddProgram( p_input, 0, 0) == NULL )
 284     {
 285         vlc_mutex_unlock( &p_input->stream.stream_lock );
 286         msg_Err( p_input, "cannot add program" );
 287         MP4End( p_input );
 288         return( -1 );
 289     }
 290     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 291     p_input->stream.i_mux_rate = 0 ; /* FIXME */
 292     vlc_mutex_unlock( &p_input->stream.stream_lock );
 293
 294
 295     for( i = 0; i < p_demux->i_tracks; i++ )
 296     {
 297         /* start decoder for this track if enable by default*/
 298         if( p_demux->track[i].b_enable )
 299         {
 300             MP4_StartDecoder( p_input, &p_demux->track[i] );
 301         }
 302     }
 303
 304     vlc_mutex_lock( &p_input->stream.stream_lock );
 305     p_input->stream.p_selected_program->b_is_ok = 1;
 306     vlc_mutex_unlock( &p_input->stream.stream_lock );
 307
 308     return( 0 );
 309
 310 }
 311
 312 /*****************************************************************************
 313  * MP4Demux: read packet and send them to decoders
 314  *****************************************************************************/
 315 static int MP4Demux( input_thread_t *p_input )
 316 {
 317     demux_data_mp4_t *p_demux = p_input->p_demux_data;
 318     int i_track;
 319
 320     /* first wait for the good time to read a packet */
 321
 322     input_ClockManageRef( p_input,
 323                           p_input->stream.p_selected_program,
 324                           p_demux->i_pcr );
 325
 326
 327     /* update pcr XXX in mpeg scale so in 90000 unit/s */
 328     p_demux->i_pcr = MP4_GetMoviePTS( p_demux ) * 9 / 100;
 329
 330
 331     /* we will read 100ms for each stream so ...*/
 332     p_demux->i_time += __MAX( p_demux->i_timescale / 10 , 1 );
 333
 334
 335     for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
 336     {
 337         if( ( !p_demux->track[i_track].b_ok )||
 338             ( !p_demux->track[i_track].p_es )||
 339             ( !p_demux->track[i_track].p_es->p_decoder_fifo )||
 340             ( MP4_GetTrackPTS( &p_demux->track[i_track] ) >=
 341                         MP4_GetMoviePTS( p_demux ) ) )
 342         {
 343             continue; /* no need to read something */
 344         }
 345
 346         while( MP4_GetTrackPTS( &p_demux->track[i_track] ) <
 347                         MP4_GetMoviePTS( p_demux ) )
 348         {
 349
 350             pes_packet_t *p_pes;
 351
 352             /* read a sample */
 353             if( !MP4_ReadSample( p_input ,
 354                                  &p_demux->track[i_track],
 355                                  &p_pes ) )
 356             {
 357                 break;
 358             }
 359
 360             /* send it to decoder and update time of this track
 361                  it also launch a new decoder if needed */
 362             MP4_DecodeSample( p_input ,
 363                               &p_demux->track[i_track],
 364                               p_pes );
 365         }
 366
 367     }
 368
 369     /* now check if all tracks are finished or unhandled*/
 370
 371     for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
 372     {
 373         if( ( p_demux->track[i_track].b_ok )&&
 374             ( p_demux->track[i_track].i_sample < p_demux->track[i_track].i_sample_count )&&
 375             ( p_demux->track[i_track].p_es )&&
 376             ( p_demux->track[i_track].p_es->p_decoder_fifo ) )
 377         {
 378             return( 1 );
 379         }
 380     }
 381
 382     return( 0 ); /* EOF */
 383 }
 384
 385 /*****************************************************************************
 386  * MP4End: frees unused data
 387  *****************************************************************************/
 388 static void MP4End( input_thread_t *p_input )
 389 {
 390 #define FREE( p ) \
 391     if( p ) { free( p ); }
 392     int i_track;
 393     demux_data_mp4_t *p_demux = p_input->p_demux_data;
 394
 395     msg_Dbg( p_input, "Freeing all memory" );
 396     MP4_FreeBox( p_input, &p_demux->box_root );
 397     for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
 398     {
 399         int i_chunk;
 400         for( i_chunk = 0;
 401                 i_chunk < p_demux->track[i_track].i_chunk_count; i_chunk++ )
 402         {
 403             if( p_demux->track[i_track].chunk )
 404             {
 405                FREE(p_demux->track[i_track].chunk[i_chunk].p_sample_count_dts);
 406                FREE(p_demux->track[i_track].chunk[i_chunk].p_sample_delta_dts );
 407             }
 408         }
 409         if( p_demux->track->p_data_init )
 410         {
 411             input_DeletePacket( p_input->p_method_data,
 412                                 p_demux->track->p_data_init );
 413         }
 414         if( !p_demux->track[i_track].i_sample_size )
 415         {
 416             FREE( p_demux->track[i_track].p_sample_size );
 417         }
 418     }
 419     FREE( p_demux->track );
 420 #undef FREE
 421 }
 422
 423
 424 /****************************************************************************
 425  * Local functions, specific to vlc
 426  ****************************************************************************/
 427
 428 /****************************************************************************
 429  * Parse track information and create all needed data to run a track
 430  * If it succeed b_ok is set to 1 else to 0
 431  ****************************************************************************/
 432 static void MP4_ParseTrack( input_thread_t *p_input,
 433                      track_data_mp4_t *p_demux_track,
 434                      MP4_Box_t  * p_trak )
 435 {
 436     int i;
 437
 438     MP4_Box_t *p_tkhd = MP4_FindBox( p_trak, FOURCC_tkhd );
 439     MP4_Box_t *p_tref = MP4_FindBox( p_trak, FOURCC_tref );
 440     MP4_Box_t *p_edts = MP4_FindBox( p_trak, FOURCC_edts );
 441     MP4_Box_t *p_mdia = MP4_FindBox( p_trak, FOURCC_mdia );
 442
 443     MP4_Box_t *p_mdhd;
 444     MP4_Box_t *p_hdlr;
 445     MP4_Box_t *p_minf;
 446
 447     MP4_Box_t *p_vmhd;
 448     MP4_Box_t *p_smhd;
 449
 450     /* hint track unsuported */
 451
 452     /* by default, track isn't usable */
 453     p_demux_track->b_ok = 0;
 454
 455     /* by default, we don't known the categorie */
 456     p_demux_track->i_cat = UNKNOWN_ES;
 457
 458     if( ( !p_tkhd )||( !p_mdia ) )
 459     {
 460         return;
 461     }
 462
 463     /* do we launch this track by default ? */
 464     p_demux_track->b_enable = ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
 465
 466     p_demux_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID;
 467     p_demux_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536;
 468     p_demux_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536;
 469
 470     if( !p_edts )
 471     {
 472 //        msg_Warn( p_input, "Unhandled box: edts --> FIXME" );
 473     }
 474
 475     if( !p_tref )
 476     {
 477 //        msg_Warn( p_input, "Unhandled box: tref --> FIXME" );
 478     }
 479
 480     p_mdhd = MP4_FindBox( p_mdia, FOURCC_mdhd );
 481     p_hdlr = MP4_FindBox( p_mdia, FOURCC_hdlr );
 482     p_minf = MP4_FindBox( p_mdia, FOURCC_minf );
 483
 484     if( ( !p_mdhd )||( !p_hdlr )||( !p_minf ) )
 485     {
 486         return;
 487     }
 488
 489     p_demux_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale;
 490
 491     for( i = 0; i < 3; i++ )
 492     {
 493         p_demux_track->i_language[i] = p_mdhd->data.p_mdhd->i_language[i];
 494     }
 495
 496     switch( p_hdlr->data.p_hdlr->i_handler_type )
 497     {
 498         case( FOURCC_soun ):
 499             if( !( p_smhd = MP4_FindBox( p_minf, FOURCC_smhd ) ) )
 500             {
 501                 return;
 502             }
 503             p_demux_track->i_cat = AUDIO_ES;
 504             break;
 505
 506         case( FOURCC_vide ):
 507             if( !( p_vmhd = MP4_FindBox( p_minf, FOURCC_vmhd ) ) )
 508             {
 509                 return;
 510             }
 511             p_demux_track->i_cat = VIDEO_ES;
 512             break;
 513
 514         default:
 515             return;
 516     }
 517 /*  FIXME
 518     add support to:
 519     p_dinf = MP4_FindBox( p_minf, FOURCC_dinf );
 520 */
 521     if( !( p_demux_track->p_stbl = MP4_FindBox( p_minf, FOURCC_stbl ) ) )
 522     {
 523         return;
 524     }
 525
 526     if( !( p_demux_track->p_stsd = MP4_FindBox( p_demux_track->p_stbl, FOURCC_stsd ) ) )
 527     {
 528         return;
 529     }
 530
 531     /* Create chunk  index table */
 532     if( !MP4_CreateChunksIndex( p_input,p_demux_track  ) )
 533     {
 534         return; /* cannot create chunks index */
 535     }
 536
 537     /* create sample index table needed for reading and seeking */
 538     if( !MP4_CreateSamplesIndex( p_input, p_demux_track ) )
 539     {
 540         return; /* cannot create samples index */
 541     }
 542
 543     p_demux_track->b_ok = 1;
 544 }
 545
 546
 547
 548 /* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */
 549 static int MP4_CreateChunksIndex( input_thread_t *p_input,
 550                                    track_data_mp4_t *p_demux_track )
 551 {
 552     MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */
 553     MP4_Box_t *p_stsc;
 554
 555     int i_chunk;
 556     int i_index, i_last;
 557
 558
 559     if( ( !(p_co64 = MP4_FindBox( p_demux_track->p_stbl, FOURCC_stco ) )&&
 560                  !(p_co64 = MP4_FindBox( p_demux_track->p_stbl, FOURCC_co64 ) ) )||
 561         ( !(p_stsc = MP4_FindBox( p_demux_track->p_stbl, FOURCC_stsc ) ) ))
 562     {
 563         return( 0 );
 564     }
 565
 566     p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
 567     if( !p_demux_track->i_chunk_count )
 568     {
 569         msg_Warn( p_input, "No chunk defined" );
 570         return( 0 );
 571     }
 572     p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
 573                                    sizeof( chunk_data_mp4_t ) );
 574
 575     /* first we read chunk offset */
 576     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 577     {
 578         p_demux_track->chunk[i_chunk].i_offset =
 579                 p_co64->data.p_co64->i_chunk_offset[i_chunk];
 580     }
 581
 582     /* now we read index for SampleEntry( soun vide mp4a mp4v ...)
 583         to be used for the sample XXX begin to 1
 584         We construct it begining at the end */
 585     i_last = p_demux_track->i_chunk_count; /* last chunk proceded */
 586     i_index = p_stsc->data.p_stsc->i_entry_count;
 587     if( !i_index )
 588     {
 589         msg_Warn( p_input, "cannot read chunk table or table empty" );
 590         return( 0 );
 591     }
 592
 593     while( i_index )
 594     {
 595         i_index--;
 596         for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 597                 i_chunk < i_last; i_chunk++ )
 598         {
 599             p_demux_track->chunk[i_chunk].i_sample_description_index =
 600                     p_stsc->data.p_stsc->i_sample_description_index[i_index];
 601             p_demux_track->chunk[i_chunk].i_sample_count =
 602                     p_stsc->data.p_stsc->i_samples_per_chunk[i_index];
 603         }
 604         i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 605     }
 606
 607     p_demux_track->chunk[i_chunk].i_sample_first = 0;
 608     for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 609     {
 610         p_demux_track->chunk[i_chunk].i_sample_first =
 611             p_demux_track->chunk[i_chunk-1].i_sample_first +
 612                 p_demux_track->chunk[i_chunk-1].i_sample_count;
 613
 614     }
 615
 616     msg_Dbg( p_input, "read %d chunk", p_demux_track->i_chunk_count );
 617     return( 1 );
 618
 619 }
 620
 621
 622
 623 static int MP4_CreateSamplesIndex( input_thread_t *p_input,
 624                                    track_data_mp4_t *p_demux_track )
 625 {
 626     MP4_Box_t *p_stts; /* makes mapping between sample and decoding time,
 627                           ctts make same mapping but for composition time,
 628                           not yet used and probably not usefull */
 629     MP4_Box_t *p_stsz; /* gives sample size of each samples, there is also stz2
 630                           that uses a compressed form FIXME make them in libmp4
 631                           as a unique type */
 632     /* TODO use also stss and stsh table for seeking */
 633     /* FIXME use edit table */
 634     int i_sample;
 635     int i_chunk;
 636
 637     int i_index;
 638     int i_index_sample_used;
 639
 640     u64 i_last_dts;
 641
 642     p_stts = MP4_FindBox( p_demux_track->p_stbl, FOURCC_stts );
 643     p_stsz = MP4_FindBox( p_demux_track->p_stbl, FOURCC_stsz ); /* FIXME and stz2 */
 644
 645
 646     if( ( !p_stts )||( !p_stsz ) )
 647     {
 648         msg_Warn( p_input, "cannot read sample table" );
 649         return( 0 );
 650     }
 651
 652     p_demux_track->i_sample_count = p_stsz->data.p_stsz->i_sample_count;
 653
 654
 655     /* for sample size, there are 2 case */
 656     if( p_stsz->data.p_stsz->i_sample_size )
 657     {
 658         /* 1: all sample have the same size, so no need to construct a table */
 659         p_demux_track->i_sample_size = p_stsz->data.p_stsz->i_sample_size;
 660         p_demux_track->p_sample_size = NULL;
 661     }
 662     else
 663     {
 664         /* 2: each sample can have a different size */
 665         p_demux_track->i_sample_size = 0;
 666         p_demux_track->p_sample_size =
 667             calloc( p_demux_track->i_sample_count, sizeof( u32 ) );
 668
 669         for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
 670         {
 671             p_demux_track->p_sample_size[i_sample] =
 672                     p_stsz->data.p_stsz->i_entry_size[i_sample];
 673         }
 674     }
 675     /* we have extract all information from stsz,
 676         now use stts */
 677
 678     /* if we don't want to waste too much memory, we can't expand
 679        the box !, so each chunk will contain an "extract" of this table
 680        for fast research */
 681
 682     i_last_dts = 0;
 683     i_index = 0; i_index_sample_used =0;
 684     /* create and init last data for each chunk */
 685     for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 686     {
 687
 688         int i_entry, i_sample_count, i;
 689         /* save last dts */
 690         p_demux_track->chunk[i_chunk].i_first_dts = i_last_dts;
 691     /* count how many entries needed for this chunk
 692        for p_sample_delta_dts and p_sample_count_dts */
 693
 694         i_entry = 0;
 695         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 696         while( i_sample_count > 0 )
 697         {
 698             i_sample_count -= p_stts->data.p_stts->i_sample_count[i_index+i_entry];
 699             if( i_entry == 0 )
 700             {
 701                 i_sample_count += i_index_sample_used; /* don't count already used sample
 702                                                    int this entry */
 703             }
 704             i_entry++;
 705         }
 706         /* allocate them */
 707         p_demux_track->chunk[i_chunk].p_sample_count_dts =
 708             calloc( i_entry, sizeof( u32 ) );
 709         p_demux_track->chunk[i_chunk].p_sample_delta_dts =
 710             calloc( i_entry, sizeof( u32 ) );
 711
 712         /* now copy */
 713         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 714         for( i = 0; i < i_entry; i++ )
 715         {
 716             int i_used;
 717             int i_rest;
 718
 719             i_rest = p_stts->data.p_stts->i_sample_count[i_index] - i_index_sample_used;
 720
 721             i_used = __MIN( i_rest, i_sample_count );
 722
 723             i_index_sample_used += i_used;
 724
 725             p_demux_track->chunk[i_chunk].p_sample_count_dts[i] = i_used;
 726
 727             p_demux_track->chunk[i_chunk].p_sample_delta_dts[i] =
 728                         p_stts->data.p_stts->i_sample_delta[i_index];
 729
 730             i_last_dts += i_used *
 731                     p_demux_track->chunk[i_chunk].p_sample_delta_dts[i];
 732
 733             if( i_index_sample_used >=
 734                              p_stts->data.p_stts->i_sample_count[i_index] )
 735             {
 736                 i_index++;
 737                 i_index_sample_used = 0;
 738             }
 739         }
 740
 741     }
 742
 743     msg_Dbg( p_input, "read %d samples", p_demux_track->i_sample_count );
 744
 745     return( 1 );
 746 }
 747
 748 static void MP4_StartDecoder( input_thread_t *p_input,
 749                                  track_data_mp4_t *p_demux_track )
 750 {
 751     MP4_Box_t *p_sample;
 752     int i;
 753     int i_chunk;
 754     u8  *p_bmih;
 755
 756     int i_codec;
 757     char *psz_name;
 758
 759     MP4_Box_t *p_esds;
 760
 761
 762     if( (!p_demux_track->b_ok )||( p_demux_track->i_cat == UNKNOWN_ES ) )
 763     {
 764         return;
 765     }
 766
 767     msg_Dbg( p_input, "Starting decoder (track ID 0x%x)",
 768                       p_demux_track->i_track_ID );
 769
 770     /* launch decoder according in chunk we are */
 771     i_chunk = p_demux_track->i_chunk;
 772
 773     if( !p_demux_track->chunk[i_chunk].i_sample_description_index )
 774     {
 775         msg_Warn( p_input, "invalid SampleEntry index for this track i_cat %d" );
 776         return;
 777     }
 778
 779     p_sample = MP4_FindNbBox( p_demux_track->p_stsd,
 780                               p_demux_track->chunk[i_chunk].i_sample_description_index - 1);
 781
 782     if( !p_sample )
 783     {
 784         msg_Warn( p_input, "cannot find SampleEntry for this track" );
 785         return;
 786     }
 787
 788
 789     vlc_mutex_lock( &p_input->stream.stream_lock );
 790     p_demux_track->p_es = input_AddES( p_input,
 791                                        p_input->stream.p_selected_program,
 792                                        p_demux_track->i_track_ID,
 793                                        0 );
 794     vlc_mutex_unlock( &p_input->stream.stream_lock );
 795     /* Initialise ES, first language as description */
 796     for( i = 0; i < 3; i++ )
 797     {
 798         p_demux_track->p_es->psz_desc[i] = p_demux_track->i_language[i];
 799     }
 800     p_demux_track->p_es->psz_desc[4] = 0;
 801
 802     p_demux_track->p_es->i_stream_id = p_demux_track->i_track_ID;
 803
 804     p_demux_track->p_es->i_type = UNKNOWN_ES;
 805     p_demux_track->p_es->i_cat = p_demux_track->i_cat;
 806
 807     /* search for the codec */
 808     if( !MP4_GetCodec( p_sample->i_type, &i_codec, &psz_name ) )
 809     {
 810         msg_Warn( p_input, "%s (%c%c%c%c) unsupported",
 811                   psz_name,
 812                   (p_sample->i_type >> 24)&0xff,
 813                   (p_sample->i_type >> 16)&0xff,
 814                   (p_sample->i_type >> 8)&0xff,
 815                   (p_sample->i_type )&0xff);
 816         p_demux_track->b_ok = 0;
 817         return;
 818     }
 819     else
 820     {
 821         p_demux_track->p_es->i_type = i_codec;
 822         msg_Info( p_input, "%s supported", psz_name );
 823     }
 824
 825     switch( p_demux_track->i_cat )
 826     {
 827         case( VIDEO_ES ):
 828             p_demux_track->p_es->b_audio = 0;
 829
 830             /* now create a bitmapinfoheader_t for decoder */
 831             p_bmih = malloc( 40 );
 832             memset( p_bmih, 0, 40);
 833             MP4_Set4BytesLE( p_bmih, 40 );
 834             if( p_sample->data.p_sample_mp4v->i_width )
 835             {
 836                 MP4_Set4BytesLE( p_bmih + 4, p_sample->data.p_sample_mp4v->i_width );
 837             }
 838             else
 839             {
 840                 /* use display size */
 841                 MP4_Set4BytesLE( p_bmih + 4, p_demux_track->i_width );
 842             }
 843             if( p_sample->data.p_sample_mp4v->i_height )
 844             {
 845                 MP4_Set4BytesLE( p_bmih + 8, p_sample->data.p_sample_mp4v->i_height );
 846             }
 847             else
 848             {
 849                 MP4_Set4BytesLE( p_bmih + 8, p_demux_track->i_height );
 850             }
 851
 852             p_demux_track->p_es->p_demux_data = p_bmih;
 853             break;
 854         case( AUDIO_ES ):
 855             p_demux_track->p_es->b_audio = 1;
 856             break;
 857         default:
 858             break;
 859     }
 860
 861     vlc_mutex_lock( &p_input->stream.stream_lock );
 862     input_SelectES( p_input, p_demux_track->p_es );
 863     vlc_mutex_unlock( &p_input->stream.stream_lock );
 864
 865
 866     p_demux_track->b_ok = 1;
 867
 868     /* now see if esds is present and i so create a data packet
 869         with decoder_specific_info  */
 870     if( ( p_esds = MP4_FindBox( p_sample, FOURCC_esds ) )&&
 871         ( p_esds->data.p_esds->es_descriptor.p_decConfigDescr )&&
 872         ( p_esds->data.p_esds->es_descriptor.p_decConfigDescr->i_decoder_specific_info_len ) )
 873     {
 874         data_packet_t *p_data;
 875         int i_size = p_esds->data.p_esds->es_descriptor.p_decConfigDescr->i_decoder_specific_info_len;
 876
 877         /* data packet for the data */
 878         if( !(p_data = input_NewPacket( p_input->p_method_data, i_size ) ) )
 879         {
 880             return;
 881         }
 882
 883         /* initialisation of all the field */
 884         memcpy( p_data->p_payload_start,
 885                 p_esds->data.p_esds->es_descriptor.p_decConfigDescr->p_decoder_specific_info,
 886                 i_size );
 887         p_demux_track->p_data_init = p_data;
 888     }
 889
 890
 891     return;
 892 }
 893
 894
 895 static void MP4_StopDecoder( input_thread_t *p_input,
 896                              track_data_mp4_t *p_demux_track )
 897 {
 898     msg_Dbg( p_input, "Stopping decoder (track ID 0x%x)",
 899                       p_demux_track->i_track_ID );
 900
 901     input_UnselectES( p_input, p_demux_track->p_es );
 902     p_demux_track->p_es = NULL;
 903     if( p_demux_track->p_data_init )
 904     {
 905         input_DeletePacket( p_input->p_method_data,
 906                             p_demux_track->p_data_init );
 907         p_demux_track->p_data_init = NULL;
 908     }
 909
 910 }
 911
 912 static int  MP4_ReadSample( input_thread_t *p_input,
 913                             track_data_mp4_t *p_demux_track,
 914                             pes_packet_t **pp_pes )
 915 {
 916     int i_size;
 917     off_t i_pos;
 918
 919     data_packet_t *p_data;
 920
 921
 922     /* this track have already reach the end */
 923     if( p_demux_track->i_sample >= p_demux_track->i_sample_count )
 924     {
 925         *pp_pes = NULL;
 926         return( 0 );
 927     }
 928     /* caculate size and position for this sample */
 929     i_size = p_demux_track->i_sample_size ?
 930         p_demux_track->i_sample_size : p_demux_track->p_sample_size[p_demux_track->i_sample];
 931     /* TODO */
 932     i_pos  = MP4_GetTrackPos( p_demux_track );
 933
 934     /* go,go go ! */
 935     if( ! MP4_SeekAbsolute( p_input, i_pos ) )
 936     {
 937         return( 0 );
 938     }
 939
 940     /* now create a pes */
 941     if( !(*pp_pes = input_NewPES( p_input->p_method_data ) ) )
 942     {
 943         return( 0 );
 944     }
 945     /* and a data packet for the data */
 946     if( !(p_data = input_NewPacket( p_input->p_method_data, i_size ) ) )
 947     {
 948         input_DeletePES( p_input->p_method_data, *pp_pes );
 949         *pp_pes = NULL;
 950         return( 0 );
 951     }
 952
 953     /* initialisation of all the field */
 954     (*pp_pes)->i_dts =
 955         (*pp_pes)->i_pts = MP4_GetTrackPTS( p_demux_track );
 956     (*pp_pes)->p_first = (*pp_pes)->p_last  = p_data;
 957     (*pp_pes)->i_nb_data = 1;
 958     (*pp_pes)->i_pes_size = i_size;
 959
 960     if( !i_size )
 961     {
 962         return( 1 );
 963     }
 964
 965 //    msg_Dbg( p_input, "will read %d bytes", i_size );
 966     if( !MP4_ReadData( p_input, p_data->p_payload_start, i_size ) )
 967     {
 968         input_DeletePES( p_input->p_method_data, *pp_pes );
 969         input_DeletePacket( p_input->p_method_data, p_data );
 970         return( 0 );
 971     }
 972
 973         return( 1 );
 974 }
 975
 976
 977 static int  MP4_DecodeSample( input_thread_t *p_input,
 978                               track_data_mp4_t *p_demux_track,
 979                               pes_packet_t *p_pes )
 980 {
 981
 982     if( !p_pes )
 983     {
 984         return( 0 );
 985     }
 986
 987     /* don't forget to convert in mpeg clock */
 988     /* FIXME correct ffmpeg to use dts instead of pts that it incorrect
 989        and, set it here ( and correct avi demux ) */
 990     p_pes->i_dts =
 991         p_pes->i_pts = input_ClockGetTS( p_input,
 992                                          p_input->stream.p_selected_program,
 993                                          p_pes->i_pts * 9/100);
 994
 995
 996     if( p_demux_track->p_data_init )
 997     {
 998         pes_packet_t *p_pes_init;
 999         /* create a pes packet containing decoder initialisation
1000            with the one we will send to decoder */
1001         if( !(p_pes_init = input_NewPES( p_input->p_method_data ) ) )
1002         {
1003             msg_Err( p_input, "out of memory" );
1004             return( 0 );
1005         }
1006
1007         p_pes_init->p_first =
1008             p_pes_init->p_last = p_demux_track->p_data_init;
1009
1010         p_pes_init->i_pes_size = p_demux_track->p_data_init->p_payload_end -
1011                                    p_demux_track->p_data_init->p_payload_start;
1012         p_pes_init->i_nb_data = 1;
1013
1014         input_DecodePES( p_demux_track->p_es->p_decoder_fifo, p_pes_init );
1015         p_demux_track->p_data_init = NULL;
1016     }
1017
1018     input_DecodePES( p_demux_track->p_es->p_decoder_fifo, p_pes );
1019
1020     /* now update sample position */
1021     p_demux_track->i_sample++; /* easy ;) */
1022     if( p_demux_track->i_sample >= p_demux_track->i_sample_count )
1023     {
1024         /* we have reach end of the track so free decoder stuff */
1025         MP4_StopDecoder( p_input, p_demux_track );
1026         return( 1 );
1027     }
1028     /* Have we changed chunk ? */
1029     if( p_demux_track->i_sample >=
1030             p_demux_track->chunk[p_demux_track->i_chunk].i_sample_first +
1031                 p_demux_track->chunk[p_demux_track->i_chunk].i_sample_count )
1032     {
1033         /* we haven't reached the end of the track, so see if we
1034            have to change the decoder for the next frame because
1035            i_sample_description_index have changed */
1036
1037         p_demux_track->i_chunk++;
1038         if( p_demux_track->chunk[p_demux_track->i_chunk-1].i_sample_description_index
1039               != p_demux_track->chunk[p_demux_track->i_chunk].i_sample_description_index  )
1040         {
1041             /* FIXME */
1042             msg_Err( p_input, "I need to change the decoder but not yet implemented" );
1043             return( 0 );
1044         }
1045     }
1046
1047
1048     return( 1 );
1049 }
1050
1051
1052